One reason that people like to sell via an auction is that it gets the highest $ amount. One reason is the whole bidding frenzy that people get into - it's not as bad on-line as in real life, but people think it's only an extra dollar - so why not. That goes on and on until the price is higher than a reasonable person would have paid if it was just for sale at that amount.
That's one reason I like sniping, you decide how much you're willing to pay, and then leave it at that. If your snipe was what you thought it was worth, set it and forget it.
If it goes higher than that, what do you care - someone paid more than you think it's worth - so be it.
BUT - if your snipe goes through at less than your maximum - yipee - you got it for less than you thought it was worth!